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A Reputation Response Set for Email Identifiers
RFC 7073

Internet Engineering Task Force (IETF)                     N. Borenstein
Request for Comments: 7073                                      Mimecast
Category: Standards Track                                   M. Kucherawy
ISSN: 2070-1721                                            November 2013

            A Reputation Response Set for Email Identifiers

Abstract

   This document defines a response set for describing assertions a
   reputation service provider can make about email identifiers, for use
   in generating reputons.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 5741.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7073.

Copyright Notice

   Copyright (c) 2013 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must
   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Borenstein & Kucherawy       Standards Track                    [Page 1]
RFC 7073             Email Identifiers Response Set        November 2013

Table of Contents

   1. Introduction ....................................................2
   2. Terminology and Definitions .....................................2
      2.1. Key Words ..................................................2
      2.2. Email Definitions ..........................................2
      2.3. Other Definitions ..........................................3
   3. Discussion ......................................................3
      3.1. Assertions .................................................3
      3.2. Response Set Extensions ....................................4
      3.3. Identifiers ................................................4
      3.4. Query Extensions ...........................................5
   4. IANA Considerations .............................................5
      4.1. Registration of 'email-id' Reputation Application ..........5
   5. Security Considerations .........................................6
   6. References ......................................................7
      6.1. Normative References .......................................7
      6.2. Informative References .....................................7
   Appendix A. Positive vs. Negative Assertions .......................8
   Appendix B. Acknowledgments ........................................8

1.  Introduction

   This document specifies a response set for describing the reputation
   of an email identifier.  A "response set" in this context is defined
   in [RFC7070] and is used to describe assertions a reputation service
   provider can make about email identifiers as well as metadata that
   can be included in such a reply beyond the base set specified there.

   An atomic reputation response is called a "reputon", defined in
   [RFC7071].  That document also defines a media type to contain a
   reputon for transport, and creates a registry for reputation
   applications and the interesting parameters of each.

2.  Terminology and Definitions

   This section defines terms used in the rest of the document.

2.1.  Key Words

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in [KEYWORDS].

2.2.  Email Definitions

   Commonly used definitions describing entities in the email
   architecture are defined and discussed in [EMAIL-ARCH].

Borenstein & Kucherawy       Standards Track                    [Page 2]
RFC 7073             Email Identifiers Response Set        November 2013

2.3.  Other Definitions

[include full document text]